CN109871141B - Wiring area protection method in touch screen manufacturing process - Google Patents
Wiring area protection method in touch screen manufacturing process Download PDFInfo
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- CN109871141B CN109871141B CN201811631143.7A CN201811631143A CN109871141B CN 109871141 B CN109871141 B CN 109871141B CN 201811631143 A CN201811631143 A CN 201811631143A CN 109871141 B CN109871141 B CN 109871141B
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Abstract
The invention provides a wiring area protection method in a touch screen manufacturing process, which comprises the following steps: covering a first protective adhesive outside a visible area of the ITO conductive layer; covering a second protective adhesive on a wiring area of the ITO conductive layer, wherein the inner edge of the second protective adhesive is positioned between the edge of the first protective adhesive and the inner edge of the wiring area, and the outer edge of the second protective adhesive is superposed with the outer edge of the outline area of the touch screen; solidifying the first protective glue and the second protective glue into a film shape, and stripping the second protective glue; and printing a wiring area of the touch screen, and protecting the wiring area of the touch screen.
Description
Technical Field
The invention relates to the technical field of touch screens, in particular to a wiring area protection method in a touch screen manufacturing process.
Background
Fig. 1 shows the structure of a conventional capacitive touch screen and a four-wire resistive touch screen, where the wiring areas are located on four sides of the touch screen, the shadow filling part ABCD in the diagram is the wiring area, the middle part ABCD is the visible area, and e is the lead of the wiring area. The wiring area is printed by a plurality of processes including silver paste printing, insulating oil printing, transparent oil printing, decorative ink printing, viscose printing and the like. Such a large number of multi-step printing processes and curing processes may damage or contaminate an Indium Tin Oxide (ITO) conductive layer in a visible region, thereby causing functional defects such as scratches, stains, white spots, and the like, and appearance defects.
Therefore, in the manufacturing process of the touch screen, in order to protect the ITO conductive layer, a strippable protective adhesive is printed in the visible area ABCD before the silk-screen printing process of the wiring area, the strippable protective adhesive is attached to the surface of the ITO conductive layer in a silk-screen printing mode, and the ITO conductive layer can be protected from being interfered by scratches, dirt and the like in the subsequent multiple printing processes through heat drying and curing, and finally the strippable protective adhesive can be stripped after the silk-screen printing is finished.
However, in the prior art, only the visible area is protected, and the wiring area is not protected. Before the silk-screen printing process of the wiring area, the production turnover process is more, the wiring area is easy to pollute, the line of the wiring area is influenced, and the silk-screen printing line of the wiring area is poor, for example, the line is broken or the adhesion force is poor due to pollution.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a wiring area protection method in a touch screen manufacturing process, which is used for protecting the wiring area of the touch screen and reducing the reject ratio of silk-screen circuits in the wiring area.
According to the above object, the present invention provides a method for protecting a wiring area in a touch screen manufacturing process, the method comprising:
covering a first protective adhesive outside a visible area of the ITO conductive layer;
covering a second protective adhesive on a wiring area of the ITO conductive layer, wherein the inner edge of the second protective adhesive is positioned between the edge of the first protective adhesive and the inner edge of the wiring area, and the outer edge of the second protective adhesive is superposed with the outer edge of the outline area of the touch screen;
curing the first protective glue and the second protective glue into a film shape, and peeling off the second protective glue;
and printing the wiring area of the touch screen.
Preferably, the distance between the first protective glue and each side of the visible area is 0.3mm-0.5mm.
Preferably, the second protective glue is in a hollow frame shape.
Preferably, the distance between the inner frame of the second protective adhesive and each edge of the first protective adhesive is 0.5mm, and the outer frame of the second protective adhesive is overlapped with the outer edge of the outline area of the touch screen.
Preferably, the first protective glue is a peelable protective glue, and the second protective glue is a peelable protective glue.
Preferably, the first protective glue is attached to the visible area of the ITO conductive layer by screen printing, and the second protective glue is attached to the wiring area of the ITO conductive layer by screen printing.
Compared with the prior art, the invention has the beneficial effects that: through before wiring district printing, respectively cover the one deck protection glue in the visible area of ITO conducting layer and wiring district, peel off the protection glue in this wiring district when the circuit printing to reach the purpose to the protection in wiring district, solved and contaminated and lead to circuit silk screen printing to appear disconnected line, line and lead to the poor problem of adhesive force because of dirty in the generation in-process wiring district, reduced the defective rate of circuit silk screen printing, provided production efficiency, saved manufacturing cost.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic diagram of a prior art four-wire resistive touch screen according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for protecting a wiring area in a touch screen manufacturing process according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a touch screen covered with a first protective glue and a second protective glue according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 2, according to an embodiment of the present invention, a method for protecting a wiring area in a touch screen manufacturing process includes:
s201, covering a first protective adhesive outside a visible area of the ITO conductive layer;
s202, covering a second protective adhesive on a wiring area of the ITO conductive layer, wherein the inner edge of the second protective adhesive is located between the edge of the first protective adhesive and the inner edge of the wiring area, and the outer edge of the second protective adhesive is overlapped with the outer edge of the outline area of the touch screen;
s203, curing the first protective glue and the second protective glue into a film shape, and stripping the second protective glue;
and S204, printing a wiring area of the touch screen.
Referring now to fig. 2 and 3, in step S201, a first protective glue is coated on the EFGH area outside the visible area ABCD of the ITO conductive layer. In an embodiment of the invention, the first protective adhesive is a peelable protective adhesive. The screen printing type touch screen is attached to an EFGH area outside a visual area of the touch screen in a screen printing mode. The distance between the EFGH area and each side of the visual area ABCD is 0.3mm-0.5mm, namely: the distance between the EF side and the AB side is 0.3-0.5 mm, the distance between the FG side and the BC side is 0.3-0.5 mm, the distance between the HG side and the CD side is 0.3-0.5 mm, and the distance between the EH side and the AD is 0.3-0.5 mm.
In step S202, a second protective adhesive covers a wiring region of the ITO conductive layer, an inner edge of the second protective adhesive is located between an edge of the first protective adhesive and an inner edge of the wiring region, and an outer edge of the second protective adhesive coincides with an outer edge of the touch screen outline region. In order to peel off the second protection adhesive more conveniently, in an embodiment of the present invention, the second protection adhesive is a hollow frame. The distance between the inner frame IJLK of the second protective adhesive and each side of the first protective adhesive EFGH is 0.5mm, namely the distance between the IJ side and the EF side is 0.5mm, the distance between the JL side and the FG side is 0.5mm, the distance between the KL side and the HG side is 0.5mm, and the distance between the IK side and the EH side is 0.5mm. And the outer frame MNOP of the second protective adhesive is superposed with the outer edge of the outline area of the touch screen.
In an embodiment of the invention, the second protective adhesive is a peelable protective adhesive. The second protective glue is attached to the wiring area of the ITO conductive layer in a screen printing mode, namely is attached to a hollow frame shape consisting of MNOP and IJLK. The second protective adhesive can be any one of the available protective adhesives for the touch screen, and mainly comprises the following components: thermoplastic resin polyvinyl chloride polymer, the proportion is 55-65%; ester plasticizer, the proportion is 30-40%; 3-8% of inorganic filler and less than 4% of stabilizer.
In step S203, the first protective adhesive and the second protective adhesive are cured into a film shape, and the second protective adhesive is peeled off. The protection is glued solidification process and turnover in-process, is glued the protection to wiring district cover protection to the realization is to the protection in wiring district, so that the wiring district is by the fish tail or dirty, thereby leads to wiring silk screen printing to appear the problem that the product is bad.
In step S204, a touch screen wiring area is printed. The printing of the wiring area mainly comprises: silver paste printing, insulating oil printing, transparent oil printing, decorative ink printing and viscose printing.
According to the technical scheme, before the wiring area is printed, the visible area of the ITO conducting layer and the wiring area are respectively covered with one layer of protective glue, and the protective glue in the wiring area is peeled off during the circuit printing, so that the purpose of protecting the wiring area is achieved, the problems that the wiring area is polluted in the generation process to cause the disconnection and connection of a circuit silk screen and poor adhesion force caused by dirt are solved, the reject ratio of the circuit silk screen is reduced, the production efficiency is improved, and the production cost is saved.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.
Claims (5)
1. A wiring area protection method in a touch screen manufacturing process is characterized by comprising the following steps:
covering a first protective adhesive outside a visible area of the ITO conductive layer;
covering a second protective adhesive on a wiring area of the ITO conductive layer, wherein the inner edge of the second protective adhesive is positioned between the edge of the first protective adhesive and the inner edge of the wiring area, and the outer edge of the second protective adhesive is superposed with the outer edge of the outline area of the touch screen;
curing the first protective glue and the second protective glue into a film shape, and peeling off the second protective glue;
printing a wiring area of the touch screen;
the second protective glue is in a hollow frame shape.
2. The method for protecting the wiring area in the manufacturing process of the touch screen as claimed in claim 1, wherein the distance between the first protective adhesive and each side of the visible area is 0.3mm-0.5mm.
3. The method for protecting the wiring area in the manufacturing process of the touch screen according to claim 1, wherein the distance between the inner frame of the second protective adhesive and each edge of the first protective adhesive is 0.5mm, and the outer frame of the second protective adhesive is overlapped with the outer edge of the outline area of the touch screen.
4. The method for protecting the wiring area in the manufacturing process of the touch screen according to claim 1, wherein the first protective adhesive is a peelable protective adhesive, and the second protective adhesive is a peelable protective adhesive.
5. The method for protecting the wiring area in the manufacturing process of the touch screen, according to claim 4, wherein the first protective glue is attached to the visible area of the ITO conductive layer by screen printing, and the second protective glue is attached to the wiring area of the ITO conductive layer by screen printing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811631143.7A CN109871141B (en) | 2018-12-29 | 2018-12-29 | Wiring area protection method in touch screen manufacturing process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811631143.7A CN109871141B (en) | 2018-12-29 | 2018-12-29 | Wiring area protection method in touch screen manufacturing process |
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| CN109871141A CN109871141A (en) | 2019-06-11 |
| CN109871141B true CN109871141B (en) | 2023-02-03 |
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| TWI453634B (en) * | 2011-06-09 | 2014-09-21 | Shih Hua Technology Ltd | Method for making touch panel |
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| US20160077626A1 (en) * | 2014-09-12 | 2016-03-17 | Apex Material Technology Corp. | Layer structure for touch panel and touch panel using same |
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| CN101639593A (en) * | 2008-07-30 | 2010-02-03 | 比亚迪股份有限公司 | Method for protecting ITO conducting layer in technology for manufacturing touch screen |
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| CN109871141A (en) | 2019-06-11 |
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